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为了解决红外无线数据通信距离短的问题,分析了红外无线数据通信的现状,概述了IrDA通信协议及原理,在此基础上设计了一种实际可行、可多节点级联的红外无线通信模块。以支持IrDA协议的单片机为载体,采用串行数据半双工通信传输方式,引入RS485级联结构,实现单个或级联红外无线数据通信。实验结果表明,单个红外节点模块可以实现在35°、120 cm的范围内无误码的有效传输,级联时可以实现300 m长距离通信,设计具有成本低、抗干扰能力强、可靠性高、可方便集成到各种设备等特点。
In order to solve the problem of short distance of infrared wireless data communication, the status of infrared wireless data communication is analyzed, the IrDA communication protocol and principle are summarized, and a practical and multi-node infrared wireless communication module is designed. In order to support the single-chip IrDA protocol as a carrier, the use of serial data half-duplex communication transmission, the introduction of RS485 cascade structure to achieve a single or cascaded infrared wireless data communications. The experimental results show that a single infrared node module can achieve effective transmission without error in the range of 35 ° and 120 cm, and achieve 300 m long-range communication when cascaded. The design has the advantages of low cost, strong anti-interference ability, high reliability, Can be easily integrated into a variety of devices and other characteristics.